KEVIN WINTER/GETTY IMAGESWhen Sheen collected 2 million followers on Twitter in record time, we might have worried all those people approved of his actions.

It’s one thing to rubberneck at an accident on the highway. It’s human nature to be curious.

If the event is unusual — a car on fire, for instance — it’s also human nature to want to linger a bit and stare.

It’s quite another for someone to set up bleachers along a notoriously dangerous section of highway, then sell tickets to the seats. The people who buy tickets are simply waiting — even hoping — for an accident.

Today’s happy news is that most Americans instinctively get this. So as of this writing, tickets to Charlie Sheen’s touring show, “My Violent Torpedo of Truth,” appear to remain widely unsold.

When Sheen collected 2 million followers on Twitter in record time, we might have worried all those people approved of his actions.

It turns out, followers aren’t always fans.

Merely following Sheen costs nothing. Most folks probably did it for casual — and guilt-free — amusement. After all, if Sheen were going to Tweet anyway, what damage could it do to read his haiku-like ramblings? No harm, no foul.

Springing for a ticket to his “tour,” however, crosses the border into Creepyville — and not by a little.

Creepy and expensive. Tickets in Detroit cost $46 to $81; at Radio City Music Hall, $94 to $127; and for his April 16 gig at the Trump Taj Mahal in Atlantic City, $86 to $130.

If you want to get your picture taken with Mr. Tiger Blood himself, you can buy the “Meet and Greet” package for $750. If that’s too rich for your non-tiger blood, there’s a $25 T-shirt.

Here’s the part that will gladden your heart: Right now on StubHub, the ticket resale site, the prices are actually lower. Ticket scalpers who scarfed up 1,375 tickets to his Wallingford, Conn., show are sitting on an unsold stack of roughly 1,371 of them, waiting for the proverbial phone to ring.

When Sheen was in his recent manic phase, churning out what seemed like a quote an hour, the endeavor involved just him and a small circle of crazy groupies.

Now, however, it’s Sheen and an ever-expanding circle of people who should know better. The Sheen tour is proving to be an adult-free zone.

Ticketmaster executives, owners of major concert venues, celebrity-minders, security personnel — everyone but Sheen — know this tour is not going to go as planned. There is no way Sheen in his current state can stage 20 shows in two countries over 31 days without very odd things happening both onstage and off. Some of them perhaps involving ambulances, unfortunately.

It’s one thing for Sheen himself to indulge in the magical thinking that allows such plans to be made. We’ll grant him that magical thinking, since he’s what we think of as the “patient.” People are allowed to display the symptoms of their illnesses.

And even though he’s already wealthy, we don’t begrudge him the money. He’s surely going to need everything he earns on the tour — either to meet his obligations as he spirals further into mental illness, or to amend his wrongs once he gets the help he needs. But all those other slimy sorts making money off his emotional free-fall? Send in the trolls.

No doubt the first few shows will be fascinating, but after that, this tour will have the moral allure of paying to glimpse the Bearded Lady at the circus.